Publications by authors named "Biederman A"

Background: This study aimed to assess the prevalence of chronic thromboembolic lesions in the pulmonary arteries among patients undergoing pulmonary embolectomy for acute pulmonary embolism and their impact on treatment outcomes.

Methods: We conducted a retrospective, single-center analysis of consecutive patients undergoing emergency pulmonary embolectomy for acute pulmonary embolism between 2013 and August 2021. According to European Society of Cardiology guidelines, the diagnosis was based on clinical presentation, imaging studies and laboratory tests.

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Acute pulmonary embolism is a significant cause of morbidity and mortality. Patients in life-threatening conditions require timely and effective interventions to improve pulmonary perfusion. The indications for surgical embolectomy in the thrombolysis era have been limited.

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Objectives: The presence of right heart thrombi in transit (RHTiT) in the setting of acute pulmonary embolism (PE) is associated with high mortality. The optimal management in such cases is inconclusive. We present the results of surgical treatment of 20 consecutive patients diagnosed with high- or intermediate-high-risk PE with coexisting RHTiT.

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A 46-year-old man 1 year after left-sided pneumonectomy for squamous cell lung cancer presented with severely limited exercise tolerance and dyspnea corresponding to World Health Organization functional class IV (WHO Class IV). After right heart catheterization (RHC), mean pulmonary artery pressure (mPAP) was 43 mmHg and pulmonary vascular resistance (PVR) was 10.2 Wood units (WU).

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Chronic thromboembolic pulmonary hypertension (CTEPH) is a rare complication of acute pulmonary embolism (APE). Both pharmacological and invasive treatments for CTEPH are available in Poland, and awareness of the disease among physicians is growing. It has been suggested that the COVID-19 pandemic may increase the incidence of CTEPH and facilitate disease detection during more advanced stages of the illness.

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Background: Balloon pulmonary angioplasty (BPA) is a promising therapy for patients with chronic thromboembolic pulmonary hypertension (CTEPH) who are ineligible for pulmonary endarterectomy.

Aims: The present study aimed to evaluate the safety and efficacy of BPA for CTEPH using the first multicentre registry of a single European country.

Methods: Data were obtained from the Database of Pulmonary Hypertension in the Polish Population (NCT03959748), a prospective, multicentre registry of adult and paediatric pulmonary arterial hypertension (PAH) and CTEPH, for a total of 236 patients with confirmed CTEPH (124 women; mean age 67 years) who underwent 1,056 BPA procedures at eight institutions in Poland.

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Background: Significant achievements in the treatment of chronic thromboembolic pulmonary hypertension (CTEPH) have provided effective therapeutic options for most patients. However, the true impact of the changed landscape of CTEPH therapies on patients' management and outcomes is poorly known. We aimed to characterize the incidence, clinical characteristics, and outcomes of CTEPH patients in the modern era of CTEPH therapies.

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Background: In this study, we aimed to assess the efficacy and safety of balloon pulmonary angioplasty (BPA) in patients with technically inoperable distal-type chronic thromboembolic pulmonary hypertension (d-CTEPH) and technically operable proximal-type disease (p-CTEPH) by analyzing the results of BPA treatment in two collaborating CTEPH referral centers.

Methods And Results: We assessed hemodynamic results, functional efficacy, complication and survival rate after BPA treatment in 70 CTEPH patients (median age 64 years; (interquartile range (IQR): 52-73 years)), of whom 16 (median age 73 years; (QR 62-82 years)) were in the p-CTEPH subgroup. Altogether, 377 BPA procedures were performed, resulting in significant ( < 0.

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As temperatures continue to rise, adjustments to biological membranes will be key for maintenance of function. It is largely unknown to what extent Antarctic notothenioids possess the capacity to remodel their biological membranes in response to thermal change. In this study, physical and biochemical properties were examined in membranes prepared from gill epithelia (plasma membranes), cardiac ventricles (microsomes, mitochondria), and brains (synaptic membranes, myelin, mitochondria) from Notothenia coriiceps following acclimation to 5 °C (or held at ambient temperature, 0 °C) for a minimum of 6 weeks.

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Pulmonary Embolism Response Team (PERT) is a multidisciplinary team established to stratify risk and choose optimal treatment in patients with acute pulmonary embolism (PE). Established for the first time at Massachusetts General Hospital in 2013, PERT is based on a concept combining a Rapid Response Team and a Heart Team. The growing role of PERTs in making individual therapeutic decisions is identified, especially in hemodynamically unstable patients with contraindications to thrombolysis or with co-morbidities, as well as in patients with intermediate-high risk in whom a therapeutic decision may be difficult.

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Antarctic notothenioid fishes are highly stenothermal, yet their tolerance for warming is species-dependent. Because a body of literature points to the loss of cardiac function as underlying thermal limits in ectothermic animals, we investigated potential relationships among properties of ventricular mitochondrial membranes in notothenioids with known differences in both cardiac mitochondrial metabolism and organismal thermal tolerance. Fluidity of mitochondrial membranes was quantified by fluorescence depolarization for the white-blooded Chaenocephalus aceratus and the red-blooded Notothenia coriiceps.

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Introduction: Trans-apical beating heart off-pump mitral valve (MV) repair is a novel surgical technique for treating mitral regurgitation (MR) caused by degenerative flail/prolapse (DLP).

Aim: To present early outcomes of a single-center experience with transapical beating heart mitral valve repair with the NeoChord system.

Material And Methods: Thirty-seven patients with severe symptomatic MR were treated with the NeoChord technique between September 2015 and December 2018 (78% men; mean age: 62.

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Introduction: Minimally invasive techniques of mitral valve (MV) repair have been increasingly used in recent years. Transapical implantation of artificial chordae on a beating heart under 2D/3D transesophageal echocardiographic guidance with the NeoChord DS1000 device is a new surgical treatment of degenerative mitral regurgitation (MR).

Aim: To evaluate early results of MV repair with the NeoChord DS1000 device in the first group of consecutive patients operated on in Poland.

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Background: Percutaneous pulmonary interventions require extensive and accurate navigation planning and guidance, especially in regard to the three-dimensional (3D) relationships between anatomical structures. In this study, we are demonstrating the feasibility of novel visualization techniques: 3D printing (3DP) and augmented reality (AR) in planning transcatheter pulmonary interventions.

Methods: Two patients were qualified for balloon pulmonary angioplasty (BPA) for treatment of chronic thromboembolic pulmonary hypertension (CTEPH) and stent implantation for pulmonary artery stenosis, respectively.

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Disruption of neuronal function is likely to influence limits to thermal tolerance. We hypothesized that with acute warming the structure and function of neuronal membranes in the Antarctic notothenioid fish Chaenocephalus aceratus are more vulnerable to perturbation than membranes in the more thermotolerant notothenioid Notothenia coriiceps. Fluidity was quantified in synaptic membranes, mitochondrial membranes, and myelin from brains of both species of Antarctic fishes.

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Background: Pulmonary endarterectomy (PEA) is the treatment of choice for chronic thromboembolic pulmonary hypertension (CTEPH). However, persistent pulmonary hypertension continues in 5-35% of patients after PEA. Recently, balloon pulmonary angioplasty (BPA) showed promise as a strategy for patients with non-operable CTEPH.

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Background: Approximately a quarter of patients with advanced sarcoidosis develop pulmonary hypertension (PH), which affects their prognosis. We report unusual case of confirmed chronic thromboembolic pulmonary hypertension (CTEPH) in a patient with stage IV sarcoidosis successfully treated with balloon pulmonary angioplasty (BPA).

Case Presentation: A 65 years old male with a history of colitis ulcerosa, and pulmonary sarcoidosis diagnosed in 10 years before, on long term oral steroids, with a history of deep vein thrombosis and acute pulmonary embolism chronically anticoagulated was referred to our center due to severe dyspnea.

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Right ventricular failure is a leading cause of mortality in patients with pulmonary arterial hypertension (PAH). However, up to 25% of such patients die unexpectedly, without warning signs of hemodynamical decompensation. We previously documented that pulmonary artery (PA) dilatation significantly increases the risk of those deaths.

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Both pharmacological and invasive treatment of chronic thromboembolic pulmonary hypertension (CTEPH) is now available in Poland and the awareness of the disease among physicians is growing. Thus, the Polish Cardiac Society's Working Group on Pulmonary Circulation in cooperation with independent experts in this field, have launched the statement on algorithm to guide a CTEPH diagnosis in patients with previous acute pulmonary embolism (APE). In Poland, every year this disease affects about 250 patients.

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Background And Aim: To assess the safety and efficacy of a refined balloon pulmonary angioplasty (BPA) strategy in patients with chronic thromboembolic pulmonary hypertension (CTEPH).

Methods: There were 157 BPA sessions performed in 56 CTEPH patients (47 non-operable, nine after pulmonary endarterectomy; aged 58.6 ± 17.

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Background: The effect of balloon pulmonary angioplasty (BPA) on improvement in functional and hemodynamic parameters in chronic thromboembolic pulmonary hypertension (CTEPH) is known, but the quality of life (QoL) of patients treated with BPA has never been studied before.

Methods and results: Twenty-five patients with inoperable or persistent CTEPH were enrolled in the study and filled out the 36-item Short Form (SF-36v2) questionnaire twice: prior to commencement of BPA treatment and after ≥3 BPA sessions. In addition WHO functional class, distance on the 6-min walk test (6MWT) and hemodynamic parameters such as right atrial pressure (RAP), mean pulmonary artery pressure (mPAP), cardiac index (CI) and pulmonary vascular resistance (PVR) were assessed.

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Background: Artificial chord implantation to repair a flail or prolapsing mitral valve leaflet requires open heart surgery and cardiopulmonary bypass.

Aim: Transapical off-pump artificial chordae implantation is a new surgical technique proposed to treat degenerative mitral valve regurgitation. The procedure is performed using the NeoChord DS1000 system (NeoChord, Inc.

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